Mechanical horn.



J. F. MONDNOT.

MECHANICAL HORN.

APPLICATION FILED NOV- 7| IQII. I. ,F%%7,9?m Pmaem efll Nova 2?, 191?,

Z SHEETS-SHEET I.

WITNESSES l/WElI/TOI? arrow/5 J. F. MONNOT.

MECHANICAL HORN.

APPLICATION FILED NOV. 1. 1911.

2 SHEETSSHEET 2.

I I 3% 1 1 ,i f 1 I WITNESSES lmymgol? ATTOWJEV Patentd Nov. 27, 1917,

JOHN FERREOL MONNOT, OF PARIS,

raanon, asslsnon, BY MESNE ASSIGNMENTS, T0

LOVELL-MGCONN ELL MANUFACTURING COMPANY, A CORPORATION OF DELAWARE.

MECHANICAL HORN.

Specification of Letters Patent.

Patented Nov. 21?, 1917.

Application filed November 7, 1911'. Serial N 0. 658,999.

To all whom it may concern:

Be it known that I, JOHN 'Fnnnnon Mon- NOT, a citizen of the UnitedStates, and resident of Paris, France, have invented certain new anduseful Improvements in Me chanical Horns, of which the following is aspecification.

My present invention relates to improvements in mechanical horns of thetype in which the sound is produced by the vibration of a membrane or ametallic diaphragm. In apparatus of the above type it is essential toregulate the position of the dia-' phragm with reference to theoperating means in order to modify the nature of the sound emitted andalso to avoid damage to the diaphragm. According to present practice insuch apparatus the adjustment is effected by adjusting the vibratorymeans toand from the diaphragm and one object of my present invention isto provide means for moving the diaphragm to and from the vibratorymeans; also for operating the said vibratory means by a spring motor ofany desired type adapted to be wound up either by hand or foot orotherwise. These improvementsinsure independence and completeness of theapparatus without the necessity of using batteries or dry cells, theinconvenience of which need not be demonstrated.

An illustrative embodiment of the above described improvements is shownin the annexed drawings in which Figure 1 is a side elevation partly inverticalaxial section;

Fig. 2 is a rearelevation of the apparatus.

In these figures, l'represents the casing of the apparatus closed by theframe 2, of which the central part is arranged to receive a resonator orhorn. I

In this frame 2 is mounted the vibratory diaphragm 3 provided at itscenter with a metallic button 4: and clamped about its periphery betweenwashers 5 by ring 6 and screws 7 The vibratory movement of the diaphragmis effected by means of a rotary cam 0r toothed wheel 8 adapted forrapid rotary movement and of which the projections or teeth comesuccessively into contact with the button or wearpiece 4. The adjustmentof the diaphragm is obtained by movement of the diaphragm itself towardor from the toothed wheel 8, this adjustment being obtained by movingthe frame 2 on the case 1 of the apparatus by means of screw-thread 9 orotherwise.

The toothed wheel 8 is mounted on a shaft 10. The shaft 10 rests at oneend on the ball bearing 11 and its other end is provided with a pinion12 engaging with a gear wheel 13 fixed on the drum 14 provided with aspring 15, the whole being free to rotate on the shaft 16. To the latteris fixed one end of the spring 15, the other end being fixed to theouter wall of the drum.

The spring drum being wound up one can easily understand the operationof the whole of the apparatus by which it causes the rapid rotation ofthe toothed wheel 8 which in turn causes vibration of the diaphragm. Theamplitude of the vibrations and the resulting sound can be varied byregulating the adjustment of the diaphragm. The spring 15 of the springdrum 14 may be mounted in any desired way as, for eX- ample, a shaft 16may be provided on which is fixed one end of the spring 15. On saidshaft is also a ratchet wheel 17 of which the pawl 18 is secured to anydesired fixed point in the interior of the apparatus so as to preventrotation of the wheel 17 except in a single direction.

On the same shaft 16 is arranged to turn freely a pinion 19 on which isfixed a second ratchet wheel 20 of which the teeth are arranged in theopposite direction to those of the ratchet wheel 17 On the latter ismounted the pawl 21 of the second wheel 20. A toothed segment 22 mountedon a pivot, engages with the pinion 19 and is maintained in the positionshown in Fig. 2, by means of a spring 23. a

The winding up of this apparatus is effected by imparting a to-and-fromovement to the toothed segment 22, for example, by means of a flexibleconnection such as a cord 24 secured to a pin 25 fixed upon the toothedsegment and operated by'hand through a crank or by foot through a pedalor otherwise.

The sector 22 is also provided at the lower end with another pin 32which when the sector comes to the end of its forward move ment pushesagainst one end of a lever 27 of which the other end pressing againstthe rod 28 compresses the spring 29 thereby releasing a brake band 30-31which is pivoted on a pin2'6. The latter is normally kept oressedagainst the spring drum 1 1 by means of the spring 29 thus keeping thedrum normally stationary.

The operation of this improved apparatus is as follows When a pull of acertain amplitude is applied through the flexible connection 24: uponthe pin the toothed segment 22 moves through an arc of a circle causingrotation of the pinion 19 which through the medium of the ratchet wheel20 rotates'the ratchet wheel 17 and shaft 16 and thus winds up thespring 15 of the spring drum lt to a certain extent. The segment 22 isdrawn back to its normal position by the spring 23 causing rotation inthe opposite direction of the pinion 19 and wheel 20, the

wheel 17 remaining motionless because held byits pawl 18. The sameresult will be obtained for each pull upon the flexible connection 14,such pull operating to wind the big spring 15 either wholly or partiallyas may be desired.

In order to operate the vibrating mechanism, in this case the toothedwheel or cam 8, the pull on the flexible connection 24: should beexerted to the'extreme limit up to the stop causing thus the maximumrotation of the segment 22 which then pushes against the lever 27 whichreleases the brake and frees the spring drum 1 1 which under the actionof the spring 15 rotates and operates the toothed wheel 8 through themedium of the gearing 13 and 12.

The sound emitted by the vibration of the diaphragm 3 is interrupted assoon as the sector 22 is permitted to move back toward this normalposition because this releases the brake 30-31 and permits it to againpress against the body of the spring drum.

his to be noted that by this arrangement the apparatus is always readyto work and even in the case when the spring is completely unwound itwill always be possible to emit a short-sound by a single movement ofthe sector 22 from normal position to the extreme limit of its operativemovement.

It is evident that certain appropriate modifications can be made in thearrangement and construction of the details of this apparatus withoutchanging the invention.

I claim 1. In a signal or alarm of the class described, a diaphragm, acam operatively associated with said diaphragm, a spring for drivingsaid cam, means for compressing the spring, means for holding the camstationary during compression of the spring and means for releasing saidcam after the spring is compressed.

2. In a signal or alarm of the class described, a diaphragm, a camoperatively associated with said diaphragm, a spring for driving saidcam, means for compressing the spring, means for holding the camstationary during compression of the spring, said spring compressingmeans operating at the end of a spring compressing movement to releasesaid parts.

' 3. In a signal or alarm of the class described, a diaphragm, a camoperatively asdiaphragm at the center of the latter, arotary member forimparting, forced to-andfro vibrations-to said diaphragm by cammingengagement withsaid wear-piece and screw connections between said frontsection and said rear section for adjusting said diaphragm and itswear-piece toward and from said cam to vary the extent of the forcedvibration of the diaphragm.

5. In a signal oralarm of the class described, a diaphragm having awear-piece thereon substantially symmetrical in respect to an axis atright angles to the diaphragm at the center of the latter,'.a camadapted for engagement with said Wear-piece, means for rotating said camat high speed to. force 1 upon said diaphragm vibrations of highfrequency and meanslfor rotating said dia-- phragm about its'axis tovary theamplitude of said vibrations. I "J j Y 6. In a signaling device,the combination with an acoustic diaphragm, a rotor having camprojections adapted to vibrate said diaphragm, a coil spring, arotatable casing inclosing said spring and secured to the outer end ofthe latter, connections between'said casing and said rotor for rotatingthe latter upon a rotation ofthe former, a-rotatable member secured tothe inner endnof said spring, a ratchet and pawl forpreventing therotation of said memberin one direction, 7 a pinion concentric. with thesaid member and rotatable in either directiomratchet and pawlconnections for driving said member upon a rotation ofthe pinion in onedirec-' tion, a pivotally mounted curved segment meshing with saidpinion, manually operated means for moving said segment in onedirection, and a spring formovin'g said segment 1n the oppositedirection.

In a signaling device, the combination with an acoustic diaphragm, arotor having cam projections adapt-ed to vibrate said diaphragm, a coilspring, connections between one end of said spring and said rotor forretating the latter upon a rotation of the former, a rotatable membersecured to the other end of said spring, a ratchet and pawl forpreventing the rotation of said member in one direction, a pinionconcentric with the said member and rotatable in either direction,ratchet and pawl connections for driving said member upon a rotation ofthe pinion in one direction, a rack meshing with said pinion, manuallyoperated means for moving said rack in one direction, and a spring formoving said rack in the opposite direction.

8. A horn or signaling device, including a diaphragm a substantiallycylindrical casing extending rearwardly therefrom and secured to theperiphery thereof, a shaft journaled within said casing substantiallyparallel to said diaphragm and having a rotor secured thereto forvibrating said diaphragm, a crown gear having its axis at right anglesto said diaphragm, connections between said crown gear and said shaftfor rotating the latter, a pivoted member within said casing and movablein a plane parallel to said diaphragm, gearing and ratchet and pawlconnections between said member and said crown gear for impartingone-way rotation to said crown gear upon the oscillation of said member,and manually operable means for oscillating said member.

9. A horn or signaling device, including a diaphragm, a shaftsubstantially parallel thereto, a diaphragm vibrating rotor secured tosaid shaft, a crown gear having its axis at right angles to saiddiaphragm, means for transmitting motion to said shaft from said crowngear, a manually operable, oscillatory member, a coil spring,connections between one end of said spring and said crown gear, andratchet and pawl connections between the opposite end of said spring andsaid member.

10. A horn or signaling device, including a diaphragm, a shaft, a coilspring, a gear train connecting said shaft and one end of said spring, amanually operable oscillatory member, and ratchet and pawl connectionsbetween said member and the opposite end of said spring.

Signed at New York city in the county of New York, and State of NewYork, this sixth day of November, A. D. 1911.

JOHN FERREOL MONNOT.

Witnesses:

Gnonon O. DEAN, IRVING M. OBRIEGHT.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner or Patents, Washington, D. G.

